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TITAN FLOW CONTROL, Inc.
290 Corporate Drive
E-mail:
titan@titanfci.comLumberton, NC 28358 Web:
www.titanfci.comTel: 910.735.0000
Fax: 910.738.3848
ANSI
Class
125/150
SWING CHECKVALVE •WAFERTYPE • SINGLE DISC
MODEL: CV 31-DI (Ductile Iron Body)
Buna-N Seat • Stainless Steel Disc
REFERENCED STANDARDS & CODES
CODE
DESCRIPTION
ANSI B16.42 Ductile Iron Pipe Flanges and Flanged Fittings
ANSI B16.5 Pipe Flanges & Flanged Fittings
API 594
Wafer,Wafer-Lug, & Double Flanged Type CheckValve
API 598
Valve Inspection and Testing
MSS SP-6
Standard Finishes for Connecting-end Flanges
MSS SP-25 Standard Marking System for Valves
MSS SP-55 Quality Standard for Valve Castings
CV31-1014
BILL OF MATERIALS
(1)
No.
PART
CV 31-DI
1
Body
Ductile Iron ASTMA536
2
Seat
Buna-N O-Ring
3
Disc
(2)
Stainless Steel AISI 316
4
Plug
Carbon Steel ASTMA307B
5
Spring
(2)
Series 300 Stainless Steel
6
Spacer
PTFE Commercial
7
Shaft
Stainless Steel AISI 316
8
Eye Bolt
Carbon Steel ASTMA307B
1. Bill of Materials represents standard materials. Equivalent or better
materials may be substituted at the manufacturer's discretion.
All materials conform to ASTM specifications.
2. Denotes recommended spare parts.
TITAN
PRESSURE/ TEMPERATURE RATING
(1)
Pressure Class
Ductile Iron A536 Class 150
WOG
(Non-shock)
250 PSI @ 100 °F
PRESSURE-TEMPERATURE RATINGS
Temperature (°F)
Pressure (PSI)
-50
50
150
250
350
450
550
650
0
50
100
150
200
250
This chart displays the pressure versus
temperature ratings for the valve’s body
material per ASME/ANSI B16.42.
Max temp limits have been added for
seat and spring materials.
Ductile IronASTMA536
ANSI Class 150
450 °F MaxTemp
SS Spring
250 °F MaxTemp
Buna-N Seat
Titan FCI makes every effort to ensure the information presented on our literature accurately reflects exact product specifications. However, as product changes occur, there may be short-term differences between actual product
specifications and the information contained within our literature. Titan FCI reserves the right to make design and specification changes to improve our products without prior notification. When required, request certified drawings.
DIMENSIONS AND PERFORMANCE DATA
(1)
SIZE
in
2
2
1
/
2
3
4
5
6
8
10
12
mm
50
65
80
100
125
150
200
250
300
A
DIMENSION
FACETO FACE
(2)
in
2.12
(4)
2.38
(4)
2.62
(4)
2.62
(4)
3.25
(4)
3.75
(4)
5.0
(4)
5.5
(4)
7.12
(4)
mm
54
61
67
67
83
95
127
140
181
Ø
B
DIMENSION
OVERALL DIAMETER
in
4.00
4.88
5.25
6.88
7.75
8.75
11.00
13.38
16.13
mm
102
124
133
175
197
223
280
340
410
Ø
C
DIMENSION
INLET DIAMETER
in
1.31
1.85
2.06
3.00
3.75
4.75
6.44
7.63
9.50
mm
34
47
53
77
96
121
164
194
242
D
DIMENSION
DISC MAXTRAVEL
in
0.75
1.00
0.80
1.87
3.30
2.70
3.00
4.62
4.00
mm
19
25.5
20.3
47.5
83.8
68.6
76
117
102
ASSEMBLED
WEIGHT
lb
4.0
5.0
7.0
11.0
16.0
16.0
32.0
44.0
60.0
kg
1.8
2.3
3.2
5.0
7.2
7.3
14.5
20.0
27.2
Flow Coefficient
C
v
62
109
166
318
471
720
1384
2298
4153
Cracking Pressure
(3)
psi
≤ .25
≤ .25
≤ .25
≤ .25
≤ .25
≤ .25
≤ .25
≤ .25
≤ .25
1. Dimensions, weights, and flow coefficients are for reference only. When required, request certified drawings.
2. Face to face values have a tolerance of ±0.06 in (±2.0 mm) for sizes 10" and lower and a tolerance of ±0.12 in (±3.0 mm) for sizes 12" and larger.
3. Cracking pressure is for horizontal installations only. For vertical installations, please consult factory.
4. Face to face dimensions per API 594 Class 125.
Ductile Iron Application Notes:
Ductile Iron maintains the anti-corrosive properties of Cast Iron
while achieving a yield strength comparable to Carbon Steel. Ductile Iron also offers higher pressure/
temperature ratings than Cast Iron. For example, Ductile Iron check valves (class 150 - sizes 2" ~ 24")
are rated at 250 psi wog. By comparison, Cast Iron check valves (class 125 - sizes 2" ~ 12") are rated
at 200 psi wog and (sizes 14" ~ 24") are only rated at 150 psi wog. Ductile Iron ANSI Classes 150 has
the same bolting pattern as Cast Iron ANSI Class 125.
SEATAND SPRINGTEMPERATURE RATINGS
(1)
SEAT (O-Ring)
Temperature Range
Buna-N
-20 °F @ 250 °F
SPRING
MaximumTemperature
Series 300 Stainless Steel
450 °F
1. The listed pressure and temperature ratings for the valve's body, seat, and
spring are theoretical and may vary during actual operating conditions.
2
1
3
5
7
4 6
8
A D
ØB
ØC
ExplodedView
SideView
(shown with disc open)
Illustrations are
representative of the
CV 31-DI. Please
request certified
drawings when required.